/*
 * CCVisu is a tool for visual graph clustering
 * and general force-directed graph layout.
 * This file is part of CCVisu.
 *
 * Copyright (C) 2005-2012  Dirk Beyer
 *
 * CCVisu is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * CCVisu is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with CCVisu; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Please find the GNU Lesser General Public License in file
 * license_lgpl.txt or http://www.gnu.org/licenses/lgpl.txt
 *
 * Dirk Beyer    (firstname.lastname@uni-passau.de)
 * University of Passau, Bavaria, Germany
 */
package org.sosy_lab.ccvisu.measuring.calldep.colors;

/**
 * Provides interface to several coloring options available for dependency visualization.
 */
public class ColorProvider {

  private static ColorProvider instance;

  private ColorProvider() {
  }

  public static ColorProvider getInstance() {
    if (instance == null) {
      instance = new ColorProvider();
    }

    return instance;
  }

  public String[] getColorOptions() {
    String[] colorOptions = {
        "greenToRed",
        "logGreenToRed",
        "red"
    };

    return colorOptions;
  }

  public String getDefaultColorOption() {
    return "greenToRed";
  }

  public VertexColoring getColoringObject(String name, double minDegree,
      double maxDegree) {

    if (name.equalsIgnoreCase("greenToRed")) {
      return new LinearGreenToRed(minDegree, maxDegree);

    } else if (name.equalsIgnoreCase("red")) {
      return new LinearColoringRed(minDegree, maxDegree);

    } else if (name.equalsIgnoreCase("logGreenToRed")) {
      return new LogarithmicGreenToRed(minDegree, maxDegree);

    } else {
      throw new IllegalArgumentException(name
          + " is not a legal coloring scheme.");
    }
  }
}
